KR20010022897A - Composite link - Google Patents

Abstract

The composite link includes a fiberglass body. This body is formed by coating glass fibers with liquid resin and winding the fibers around a plurality of ends or bushings. The end piece includes a transition portion for changing the shape of the fiber passageway and the composite link. The fibers are wound in two layers, the first layer extending in the longitudinal direction of the body and the second layer extending around the first layer in the transverse direction. The barrier layer is placed on the glass fiber body.

Description

Compound link {COMPOSITE LINK}

Links, such as suspension links, are used to connect the two components together. In automatic use, links are often used in suspension structures. This link allows the connected components to move along one axis with respect to each other.

One type of known link is an integrally cast or forged metal link. Each end of the link includes a cylinder with a cavity. The axes through the center of the cavity with the cavities are parallel to each other. This cylinder is connected by a circular rod or tube. Cylindrical rubber inserts are press fit into cylinders with respective cavities. There is a metal bushing with a cavity in each insert.

The link may be made of three metal tubes welded together. Two of these tubes constitute cylinders with cavities and the last tube is used as a connecting piece.

The link is connected to other components by bolts. This bolt is placed on the component through the tongue of a fork or yoke. The bolt is then placed through the bushing. This bolt is also placed on the component via another fork or yoke. Finally, the nut is clamped to the bolt to hold the link.

Parallel bushings allow the components to rotate along one axis at each end of the link. Rubber inserts allow limited angular and transverse movements. Rubber inserts dampen vibrations and shocks. Thus, vibrations and shocks are not transmitted from one end of the link to the other.

There are several problems with this link. Since this link is metal, the link adds real weight to the vehicle. As the weight increases, the total number of miles decreases. Forging, casting and welding also add cost to the link.

The present invention generally relates to composite links. In particular, the present disclosure relates to improved composite fiber links, such as suspension links.

In addition to the objects and advantages of the present invention, the invention, including the method of operation and the structure, is illustrated in the accompanying drawings:

1 is a perspective view of a composite link incorporating features of the present invention;

2 is a perspective view of the composite link components shown in FIG. 1;

3 is a cross-sectional view of the composite link shown in FIG. 1 along line A-A;

4 is an enlarged cross sectional view of the composite link shown in FIG. 1 along the line B-B;

5 is a cross-sectional view of the end piece shown in FIG. 2 along the line C-C;

6 is a cross-sectional view of the end piece shown in FIG. 2 along the line D-D;

7 shows one step in the method of winding the fibers of the link shown in FIG. 1;

8 shows another step in the method of winding the fibers of the link shown in FIG. 1;

9 is a perspective view of a composite insulator having a fiber winding and a curved connecting rod;

FIG. 10 shows another end piece, FIG. 10A is a cross sectional view of the end piece having a spherical bushing; 10b is a perspective view of an end with a cylinder separate from the transition portion with a cross section with two different cylinders; 10C is a perspective view of the yoke end;

It is an object of the present invention to provide an improved link, which avoids the aforementioned problems.

According to one embodiment of the present disclosure, a composite link is provided. The connecting rod has a first cross sectional shape. At least one end is adjacent to the connecting rod. This end piece has a first, a second end, where the first end has a shape of the first cross section and a suitable second cross-sectional shape and the second end has a third cross-sectional shape different from the second cross-sectional shape. The fibers are wound around a second end, over a portion of the first end and over a portion of the connecting rod.

In another embodiment of the composite link, the central portion has a first cross sectional shape. The at least one first end piece has a first concave face, a second cross sectional shape that is different from the first cross sectional shape and includes a first concave face and a transition portion. This transition portion has a first cross section and a suitable second cross section at the first end and a first concave face and a suitable third cross section at the second end. The fibers are wound about a portion of the first concave face, a portion of the transition portion and a portion of the central portion.

According to another embodiment of the present invention, a composite link is provided. The first fiber is wound with a high pitch angle around the center of the link from the first neighboring end to the second end of the neighboring center. The second fiber is then wound with a low pitch angle around the first fiber.

1 shows a composite link 20 embodying features of the present invention. This composite link 20 can be used as a suspension link or insulator as described in US Pat. No. 5,406,033, the contents of which are incorporated herein by reference. For use as an insulator, the non-membrane roof is molded in the composite link 20.

2-4, the composite link 20 includes a connecting rod 22 and two fittings or end pieces 24. This connecting rod 22 is straight or curved. The connecting rod 22 is preferably tubular glass fiber for high load conditions and tubular extruded polymer for low load conditions. Thus, the connecting rod 22 has a circular cross section. This connecting rod 22 may have the shape of another cross section, such as a C-shaped, I-beam or solid cylinder.

Each end piece 24 is made of the same structure as the other end piece 24, but this end piece 24 may be made of another structure. Each end piece 24 includes a bushing 26 and an outer portion 36. Advantageously, the bushing 26 is a metal such as steel, aluminum or a cylindrical bushing.

The outer portion 36 comprises a transition portion 28, a concave surface 30, a flange 32 and a connecting bar recess 34. Preferably, the outer portion 36 is a molded elastomer, such as rubber, polyurethane or other elastic material. The outer portion 36 is molded around the bushing 26. Before molding, the adhesive is applied to the bushing 26. This adhesive keeps the bushing 26 in the outer portion 36. Unlike molding the outer portion 36 to the bushing 26, the bushing 26 is press-assembled into the pre-molded outer portion 36.

The concave surface 30 is formed by the flange 32. Each flange 32 extends at the concave face 30. This concave face 30 starts at one side of the transition portion 28 and the neighboring outer portion 36, such as the top, and of the transition portion 28 and the neighboring outer portion 36, such as the bottom. It is bent around the opposite side. Instead of being bent around the outer portion 36, the concave face 30 consists of a number of joined flat planes. This concave face 30 is round, grooved and has a different surface structure. This concave face 30 has a portion extending from the outer portion 36 beyond the flange 32.

The outer portion 36 includes a step 38 on each side adjacent to the transform portion 28. Advantageously, this step 38 consists of the thickness of the flange 32 and is about the same height as the thickness of the yarn wound as described below.

The step 38 and the concave surface 30 form a connection with the conversion portion 28. As shown in FIG. 5, the cross section and the concave surface 30 of the conversion portion 28 adjacent to step 38 are rectangular. Preferably, the transition portion 28 is flush with the concave surface 30 and the step 38 extends from the outer portion 36 beyond the transition portion 28. Thus, the two edges of rectangular cross section C-C are formed at the same height as the two concave faces 30 shown in cross section A-A of FIG. 3. Other cross-sectional shapes such as squares or circles are possible.

2, 5 and 6, the transform portion 28 comprises a connecting bar recess 34. In FIG. This connecting rod recess 34 is at the end of the end piece 24. The connecting rod recess 34 is formed to enclose a portion of the connecting rod 22, such as the end. Therefore, the connecting bar recess 34 is preferably circular. Other shapes are also possible, such as a rectangle or a rectangle for receiving a connecting rod 22 of an I-beam cross section. This connecting bar recess 34 is three quarters or one inch deep, but other sizes are possible. Advantageously, the connecting rod 22 slides into the connecting rod recess 34, but may be tightly fitted into the connecting rod recess 34.

At the end of the transition portion 28 with the connecting rod recess 34, the cross section D-D of the transformation portion 28 fits the cross section of the connecting rod 22. As shown in FIG. 6, the cross section D-D is a rectangle with rounded corners 40. The rounded edge 40 allows the outer portion 36 to fit snugly against the circular connecting rod 22. The degree of rounding the corner 40 increases from the step 38 and the concave surface 30 to the end of the outer portion 36 having the connecting bar recess 34. Therefore, the transition portion 28 gradually changes from the concave face 30 or the cross section C-C of FIG. 5 to the rounded edge 40 or the cross section D-D of FIG. 6. The transition portion 28 allows for a smooth transition from the shape of the concave face 30 to the shape of the connecting rod 22.

The transition portion 28 allows for a smooth transition from the size of the concave face to the size of the connecting rod 22. For example, cross section C-C of FIG. 5 forms a 3/4 inch * 3/4 inch rectangle and cross section D-D of FIG. 6 forms a 5/8 inch * 5/8 inch rectangle with rounded corners 40.

The conversion portion 28 has one or more grooves 42. Advantageously, two circular grooves 42 traverse to the edge 40 and are arranged at regular intervals along the transition portion 28. The groove 42 helps to attach the end piece 24 to the connecting rod 22 as described below.

In order to assemble the composite link 20, the two end pieces 24 and the connecting rod 22 described above are arranged next to each other as shown in FIG. In particular, one end of the connecting rod 22 lies inside the connecting bar recess 34 at the end, and the other end of the connecting bar 22 is arranged inside the connecting bar recess 34 at the other end. The composite link 20 includes two or more ends. For example, a connecting rod 22 having a fork at one or both ends is used. The end piece 24 is arranged at each fork or end of the connecting rod 22.

In FIGS. 7 and 8, together with the connecting rod 22 and the end piece 24, the composite link 20 includes at least one winding of one or more fibers 44 strands. Advantageously, fiber 44 is a glass fiber, but other fibers such as carbon (graphite), polymer (aramid) or bond fibers may also be used. Although various glass fibers are suitable, the preferred fiber is "E-glass". "E-glass" is an electrical grade fiber that is economical and has high mechanical strength. 7 shows a number of fibers 44, while the fibers 44 comprise a single fiber 44 or a woven fiber 44 tape.

The composite link 20 is made by winding the fiber 44 after resin coating. In general, the fibers 44 are wound longitudinally between the ends 24. Winding in the longitudinal direction forms a first layer 46 of resin coated fiber 44 and joins the end piece 24 as an entire portion of the composite link 20. As shown in FIG. 8, the same continuous fiber 44 is then wound transversely around the first layer 46 to form a second layer 50 of fiber 44. The other strand of fiber 44 is also used for all parts of the first and second layers 46 and 50.

This winding step is carried out using known winding methods. See Filament Winding, by Peter, Humphrey and Foral, published by SAMPLE, Advanced Materials and Process Engineers Association, SAMPLE, to describe the filament winding technology, including a list of patents related to this application.

In Figures 7 and 8, the winding of the fiber 44 for the composite link 20 is shown in detail. Initially, the end piece 24 is fixed to the relative position shown in Figs. 7 and 8 by the fastener. These end pieces 24 are axially aligned and spaced apart. The distance L from axis 1A of the bushing 26 to axis 1B of the other bushing 26 represents the approximate length of the composite link 20. This fixture secures the end piece 24 by means of a bushing 26 and a connection and allows relative movement of the end piece 24 during machining of the composite link 20. The side surface 52 of the end piece 24 defined by the flange 32, the step 38 and the end of the bushing 26 is advantageously covered by a fixture or other means during winding. This covering prevents the surface 52 and the ends of the bushing 26 from being soiled with resin during winding as described below.

According to the present invention, the continuous strand of fiber 44 is controlled and "wet" in a liquid resin bath (not shown). For example, the fibers 44 are coated with polyester, vinyl esters, epoxy, phenols, thermoplastic polymers or other materials with similar properties. The resin must provide good mechanical bonding and is suitable for high temperature molding, painting or dipping to form the barrier layer 48 shown in FIGS. 1, 3 and 4. Advantageously, vinyl esters are used. The preferred ratio of glass fiber and resin is 70% to 30%. Other ratios may be used depending on the desired tensile strength. The resin moves through the fibers 44 to connect each fiber 44. In another example, the fiber 44 may be pre-soaked according to the prior art.

After the resin 44 is coated with resin, the fiber 44 is wound from one end piece 24 to the other end piece 24 to form a fiber 44 loop. The fibers 44 are wound until they cover the concave face 30 of each end 24 across the full width of the concave face 30, as shown in FIG. 3. Winding the fiber 44 in the longitudinal direction forms a first layer 46 on the concave face 30 to a thickness corresponding to one-half the height of the flange 32. Where the composite link 20 includes an odd number, for example three ends, one of the ends is higher to accommodate the additional winding of the fibers 44 needed to cover the two other ends 24 as described above. It has a flange 32 and a wider concave surface 30.

8 shows another winding of the fiber 44 forming the second layer 50. Advantageously, the same fibers 44 used to form the first layer 46 are wound as one continuous length to form the second layer 50. The fiber 44 traverses the first layer 46 at one of the ends 24 and lies around the first layer 46 between the two ends 24. Preferably, the fibers 44 are wound several times from one end 24 to the other end 24. For example, the fiber 44 is loosely wound at a low pitch 10 at 170 degrees with the axis 2 shown in FIG. 8 at the first pass. Other angles can be used. During the second pass, the fiber 44 is wound tightly at a high pitch at a 90 degree angle z with the axis 2. To tightly wrap the fiber 44, the fiber 44 is pulled while tensioning the first layer 46 when the second layer 50 is wound. When tightly wound, the first layer 46 is pulled inwardly around the end piece 24 from the one loop path and air is compressed and discharged out of the first layer 46. When tightly wound, it forms the shape of the composite link 20 shown in FIG. Can be passed at different angles and variable tension can be used. For example, the number of passes is increased to increase the strength of the composite link 20.

During the second pass, the winding of the fiber 44 in the transverse direction several times is used for each end piece 24 to neighbor and form a thicker second layer 50. In particular, the fiber 44 is wound around the conversion portion 28 to a thickness similar to the height of the step 38. The grooves 42 in the transition portion 28 help to hold the resin coated fibers 44 of the second layer 50 in place in the sliding transition portion 28. Winding in the transverse direction several times assists the load bearing properties of the composite link 20 and permits a smooth transition from the side 52 to the barrier layer 48 (FIGS. 1 and 4). As with the thicker windings in the center of the composite link 20, winding the fibers 44 in the transverse direction several times may be used along other portions of the connecting rods 22.

In addition to winding the first layer 46, the tension applied while winding the second layer 50 applies a force to the end piece 24. This force holds the end piece 24 adjacent to the connecting rod 22. If the connecting rod 22 is not inserted within the full depth of each recess 34, this force can pull the end piece 24 closer. This force also tends to compress the elastomeric material of the end piece 24. The force applied by the fibers 44 keeps the tip 24 as an integral component of the composite link 20 by preventing the tip 24 from being removed.

After the fiber 44 is wound to form the composite link 20, the liquid resin is hardened firmly. Hard cure fixes the end piece 24 and the connecting rod 22 together. If desired, the resin can be oven cured to speed up the manufacturing process.

1, 3 and 4, the blocking layer 48 is applied to the composite link 20. This barrier layer 48 is a paint layer, a coating of immersed material or an injection molded coating. Preferably, epoxy paint is used. The type of material used for this barrier layer 48 should consider price, design and environmental protection. For injection molding molding, the material used is a polymer such as silicone rubber. Injection molding molding is used to form the insulator from the composite link 20. This insulator is formed in the same structure, and only the unshielded roof is molded in the blocking layer 48.

The blocking layer 48 is applied to completely cover the first 46 and second 50 layers. A fixture, such as the fixture described above, covers the exposed portion of the bushing 26 and the surface 52 at each end 24. Thus, the fastener covers the exposed portion of the end piece 24 and includes the inner portion of the bushing 26. The barrier layer 48 is spray painted on the composite link 20 or the composite link 20 is immersed in an immersion liquid coating. This barrier layer 48 is then dried or cured. Advantageously, the barrier layer 48 is flush with the flange 32 on the concave surface 30 after drying or curing and the same height as the side surface 52 along the step 38. Other coating techniques can also be used to form the barrier layer.

For injection molding molding, the die is constructed so that the upper and lower mold portions engage and cover the exposed face, such as surface 52 and bushing 26. A connecting rod that can be pulled in before the mold portion is closed is fitted in each bushing 26. This connecting rod covers the inside of the bushing 26 unless the composite link 20 is formed for use as an insulator. The silicone rubber is injection molded in a conventional manner through the port to form the barrier layer 30. Although injection molding molding is used in the above examples, other molding techniques may be used as well as other molding materials.

9 shows another connecting rod 22. This connecting rod 22 has a bend 54 along the axis 2. This connecting rod recess 34 is inclined to the end piece 24 according to the degree of curvature of the bend 54. In addition, the end of the connecting rod 22 for insertion into each connecting rod recess 34 lies parallel to the shaft 2. Other variations of the connecting rod 22 are also possible, including other portions or ends of the connecting rod 22.

With the bend 54, the fiber 44 is wound in the other manner described above to form the first layer 46. This fiber 44 is repeatedly wound from one end piece 24 to the other end piece 24. However, instead of forming a loop of fibers 44, the fibers 44 are spirally wound between the end pieces 24, as shown. As with the winding of the fiber 44 described above with reference to FIGS. 7 and 8, the fiber 44 cuts the concave face 30 of each end 24 across the full width of the concave face 30 shown in FIG. 3. Cover. The second layer 50 may be formed as described above.

10, various possible end pieces 24 are shown. In FIG. 10A, the bushing 26 is a spherical bushing with a spherical bearing joint 58. This bushing 26 is steel, aluminum, high strength fiber-reinforced polymer molding or other material. Outer portion 36 may be integral as described above or divided into two portions as shown. The two parts fit together to form a concave face 30. As shown, the outer portion 36 becomes narrower towards the bushing 26. The narrower portion of the outer portion 36 and the exposed outer surface of the bushing 26 are covered with a conventional dust cover 56. As is known in the art, the dust cover 56 protects the spherical bearing joint 58.

In FIG. 10B, another end piece 24 is shown. This end piece 24 comprises a cylinder part 60 and a conversion part 28. However, the conversion portion 28 and the cylinder portion 60 are two different portions. Cylinder portion 60 comprises a large bushing, such as a metal bushing. As shown in another cross section, the cylinder portion 60 comprises a flange 32.

The conversion portion 28 is preferably a metal piece, although other materials may be used. This transform portion 28 is the same as the transform portion 28 described above, but may not include a groove 42. In another embodiment, the transform portion 28 has a tongue 62 extending from the transform portion 28. This tongue 62 is shaped to fit snugly around the cylinder 60 portion to adjoin the cylinder 60 to hold the conversion portion 28. Advantageously, this conversion portion 28 is bonded to the cylinder portion 60 with an adhesive. Two tongues 62 and an adhesive may be used to connect the cylinder 60 and the conversion portion 28. This conversion portion 28 couples the cylinder portion 60 and the connecting rod 22 as described above.

For another embodiment shown in FIG. 10B, the rubber insert with bushing is press fit into the cylinder portion 60 as is known in the art. The fiber 44 is wound around the cylinder 60 so that the rubber insert can be removed. However, the fiber 44 retains the end piece 24 adjacent to the connecting rod as described above.

In FIG. 10C, the other end piece 24 is shown. This end piece 24 includes a yoke 64. This yoke 64 includes a sleeve 66. The sleeve 66 slides or press fits into the connecting rod 22. Advantageously, the sleeve 66 has a cross section that is round or coincides with the cross sectional shape of the connecting rod 22. Another transition portion 28 can be added over the sleeve 66 or the connecting rod 22. Fiber 44 is wound around yoke 64 between arms 68. If a conversion portion 28 is used, this conversion portion 28 allows for a smooth transition from the yoke 64 to the connecting rod 22 as described above.

All of the aforementioned end pieces 24 or other end pieces 24 are used above the composite link 20. All end pieces 24 on a given composite link 20 are of the same shape as the end piece 24 or have a different shape from the end piece 24. For example, the end piece is used in conjunction with the end piece shown in FIG. 2, as shown in FIG. 10C.

As another example, the composite link 20 is formed without the connecting rod 22. The transition portion 28 of the end piece 24 is converted from the concave face 30 to the central shape of the composite link 20, which is circular. The center of the composite link 20, or the portion between the end pieces 24, includes the first and second layers 46, 50 of the fiber 44. The central portion is formed by winding the fiber 44. This central part has a circular cross section, like a cylinder with a cavity.

The composite link 20, which does not include the connecting rod 22, is formed by keeping the tip 24 apart while the first layer 46 of fiber 44 is wound between the ends 24. The second layer 50 of fiber 44 is wound around the first layer 46 as described above. The tension of the second layer 50 can be varied to form areas with cavities inside the second layer 50 and inside the central portion.

While preferred embodiments of the invention have been described, the invention is not limited to this embodiment and may be modified without departing from the scope of the present application. For example, composite links can be made without barrier layers; The glass layers can be wound over rather than wound concentrically; The second layer can be wound in a spiral or transverse direction; Two or more layers may be included; The fiber strands are preferably continuous throughout the windings but may comprise a number of other strands. Accordingly, the scope of the invention is defined by the appended claims, and all devices within the scope of the claims are included herein.

Claims (44)

A connecting rod having a first cross-sectional shape; A first end adjacent the connecting rod comprising a first and a second end; A first end having a second cross sectional shape suitable for a first cross sectional shape; A second end having a third cross sectional shape different from the second cross sectional shape; A composite link consisting of fibers wound about a second end, over a portion of a first end and a portion of a connecting rod. The method of claim 1, The first cross-sectional shape has a circular cross-sectional shape; And the second cross-sectional shape has a cross-sectional shape selected from several groups, ie a rectangular cross section with rounded corners. The composite link of claim 1, wherein the third cross sectional shape consists of a rectangular cross section. 2. The composite link of claim 1, wherein the first end piece comprises a coupler and a coupler between the end piece and the connecting rod, the coupler having one or more second cross sectional sizes. 5. The composite link of claim 4, wherein the joiner is narrowed from the first end of the joiner to the second end of the joiner, the second end of the joiner having a second cross sectional size. 5. The composite link of claim 4, wherein said coupler comprises first and second tongues. A composite link according to claim 1, wherein the first end has a recess and the second portion of the connecting rod fits in the recess. 2. The composite link of claim 1, wherein the first end includes one or more first and second flanges. 2. The composite link of claim 1, wherein said end piece comprises one or more grooves across the fiber. The composite link of claim 1, comprising a barrier layer around a portion of the link. The composite link of claim 1, wherein the fiber strands are made of glass fibers. The composite link of claim 1, wherein the second fiber is wound around the first end and the core. The method of claim 12, wherein the second fiber is: A first layer wound at a high pitch; And And a second layer wound at a low pitch. 13. The composite link of claim 12, wherein the fiber and the second fiber consist of one fiber continuous strand. The composite link of claim 1, wherein the connecting rod comprises a fiber tube. The composite link of claim 1, wherein the end piece comprises an elastomer. The method of claim 1 wherein: A second end adjacent to the connecting rod opposite the first end; Wherein the fiber is wound around a portion of the second fitting. The composite link of claim 1, wherein the connecting rod comprises a bend and the first fiber comprises a fiber helical portion wound around the bend. The composite link of claim 1, wherein the end piece has a teardrop shape. The composite link of claim 1, wherein the end piece comprises a yoke fitting. The composite link of claim 1, wherein the end piece comprises a step and the fiber comprises a fiber wound transversely around the end piece to a thickness consistent with the height of the step. A central portion having a first cross-sectional shape; At least one first end face different from the shape of the first cross section and including the first concave face and the conversion portion; A conversion portion having a second cross-sectional shape suitable for the first cross-sectional shape at the first end and having a first concave face and a suitable third cross-sectional shape at the second end; And A composite link consisting of fibers wound over a portion of the first concave face, a portion of the transition portion, and a portion of the central portion. 23. The composite link of claim 22, wherein the central portion includes a connecting rod. The method of claim 23 wherein: The connecting rod consists of a fiber of circular cross section; The second cross-sectional shape consists of a rectangle wherein one side of the rectangular shape coincides with the first concave face; The first end consists of two or more flanges; The transition portion comprises a taper from the first end to the second end; Wherein the fiber is wound along a taper between two flanges. 23. The composite link of claim 22, wherein the fiber of the second length is wound across the connecting rod from the second adjacent end to the second fitting. An end piece comprising an outer elastomer and an inner bushing; A portion of the end and adjacent link comprising one or more fibers; And A composite link consisting of fibers wound in contact with an outer elastomer and partially in contact with the outer elastomer. 27. The composite link of claim 26, wherein the end piece comprises at least two flanges and the fibers are in partial contact between the flanges. 27. The composite link of claim 26, wherein said end piece comprises a transition portion from a flat portion to a central portion. 27. The composite link of claim 26, wherein the second fiber is wound across the fiber and the end includes one or more grooves traversing the fiber. 27. The composite link of claim 26, wherein the end piece comprises a step and the second fiber is wound across the fiber adjacent to the step to a thickness consistent with the step. A first fiber wound at a high pitch angle around the central portion of the link from the first adjacent end to the adjacent second end of the central portion; And And a second fiber wound at a low pitch angle around the first fiber. 32. The composite link of claim 31, wherein the second fiber is wound around the first fiber from an adjacent first end to an adjacent second end. 32. The composite link of claim 31, wherein the central portion comprises a third fiber wound longitudinally. 32. The composite link of claim 31, comprising a first end piece and a third fiber wound around the first fitting. 32. A composite link according to claim 31, comprising a connecting rod fitted in the center between the first and second ends. 36. The composite link of claim 35, comprising a transition portion between the first end and the core and at least one first end adjacent to the first end. 37. The composite link of claim 36, wherein said transition portion comprises grooves forming a low pitch angle with the edges. 32. The composite link of claim 31, comprising a barrier layer around a portion of the link. 34. The composite link of claim 33, wherein each of the first, second and third fibers comprises one or more glass fiber strands. 37. The composite link of claim 36, wherein the first end piece comprises one step and the first fiber and the second fiber are wound adjacent the step to a thickness equal to the height of the step. rod; Consisting of a rod and a neighboring first end, the end including a first groove and an inclined surface on an inclined surface that crosses the inclined surface of the sliding portion, A composite link comprising fibers wound parallel to the groove on this slope. 42. The composite link of claim 41, wherein the first end piece comprises a step adjacent to the inclined surface and the fibers are wound adjacent the step to a thickness equal to the height of the step. rod; A first end adjacent the rod and comprising a step; A first fiber wound over a portion of the rod and a portion of the first end; And And a second fiber wound across the first fiber with a thickness equal to the height of the step. 44. The composite link of claim 43, wherein the first end comprises a groove in the slope adjacent the step and the second fiber is wound in parallel with the groove in the slope.